Joint construction



1,5M,318 E. BERGLUND JOINT CONSTRUCTION Filed May 1,, 1922 Patented Aug.12, lgillr arr EMANUEL nnnennnn, or san rn-anclsco, caniroianin,assienon'ro GENERAL strrrLY oonrrnnr, or Los ansnnns, ontrronnra.

JOINT CONSTRUCTION.

Application filed May 1,

To all whom it may concern.

Be it known that I, EMANUEL BERGLUND, a citizen of the United States,residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented new and useful Improvements in JointConstruction, of which the following is a specification.

This invention relates to improvements in portable buildings and hasparticular reference to an improved joint construction for securing inproper assembly the rafters and ridge-boards of buildings.

The primary object of the invention is to provide a simply constructed,inexpensive and strong joint construction for rafters and ridge-boardsof portable buildings, which joint construction consists of a minimumnumber of parts, may be quickly and easily set up or taken down andwhich. will eliminate a number of operations and parts such asordinarily required in assembling portable buildings.

The invention possesses other advantages and features some of Which,with the foregoing will be set forth at length in the fo-l lowingdescription where 1 shall outline in full that form of the inventionwhich 1 have selected for illustration in the drawings ac companying andforming a part of the present specification. In said drawings I haveshown one form of the construction of my invention, but it is to beunderstood that I do not limit myself to such form since the inventionas expressed in the claims may be embodied in a plurality of forms.

Referring to the drawings:

Fig. 1 represents afragmentary perspective view of a joint constructionforming a part of this invention, shown as when join- ,ing the upperends of rafters and as adapted for connection with a ridge-board, thelatter being omitted.

Fig. 2 represents a side elevation of a roof rafter unit, theridge-board being shown in section and the joint construction of myinvention in elevation.

Fig. 3 represents a fragmentary longitudinal sectional view thru theridge-board and joint construction, parts of the ridge-board being shownin elevation as likewise are the rafters.

1922. Serial No. 557,578.

Fig. i represents the joint construction as applied to the roof andbracing rafters.

Fig. 5 represents a top plan ofthe joint shown in Fig. 4:.

Referring particularly to the form of my invention illustrated in theaccompanying drawings, the numerals 1 and 2 designate inclined raftersof aroof construction such as ordinarily employed in portable and otherbuildings, and-3 designates a crosscrafter, the ends of which are joinedto mediate portions of the rafters 1 and 2. The main joint constructionof my invention comprises like, substantially rectangular, metal plates4 and 5, certain ends of which are bent so as to extend angularly, thatis substantially horizontally, as at 6 and 7. The body portions of theplates 1 and 5 are secured by bolts to the under inclined faces of therafters 1 and 2 in such position that the portions 6 and 7 thereof willoverlap as shown in Fig. 1. A single bolt may be used for securing eachplate and a single screw 9 or other fastening element is employed inconnection with each bolt, to hold the plates in place.

Mounted upon the portion 6 of the plate a is a ridgeboard attachingplate 10 of substantially rectangular form, which plate 10 is providedcentrally of its ends with an opening 11 registering with similaropenings in the angularly disposed end portions 6 and 7. A brace rod 12is extended thru these registering openings and thru the rafter 3,

being held thereto at its lower end by a nut 13 engaging the under faceof the girder 3. A ridge-board 14 is mounted between the upper ends ofthe girders 1 and 2 and rests upon the head or nut 15 carried on theupper end of the rod 12, said head or nut engaging the upper side of theplate 10. It will thus be seen that the single bolt or rod 12 serves asan assembling and connecting medium for the portions 6 and 7 and plate10 and as a means of connection between the girder 2 and ridge-board 14.The plate 10 is of such length that it will extend several inches oneither side of the portions 6 and 7 and at its free ends is formed withopenings 16 adapted to receive bolts 17 which are inserted thru theridge-board and held in place by nuts 18. It will be seen that thejoining of the girders with the ridge-board may be quickly and easilyset up with the employment of a minimum number of parts and operationsand that the joint will be extremely durable and strong. Thedisassembling operation is easily effected when, desired.

By having the upper ends of the plates 4 and 5 overlapped and angularlydisposed, and the plate balanced upon the overlapped portions, the jointmembers are compactly arranged and so balanced as to equally distributeand take up the strains and stresses placed thereon. As shownparticularly in Figs. 4 and 5, I join the cross girder 8 to the girders1 and 2 by a simply constructed joint device comprising metal plates 19and 20 secured by bolts 21 to the under faces of the girders 1, 2 and 3.The plates l9 are provided at their outer ends with downwardly directedhook portions 22, which are adapted to engage in eyes 23 formed inangularly disposed end portions 24 of the plates 20. In securing theplates 19 and 20 it is only necessary to use a single bolt or otherfastening element for each plate. .By this joint construction it is notnecessary to employ. bolts extending thru the two rafters which engageone another and yet a strong and durable joint is provided which may bequickly and easily set up or taken down.

I claim:

, 1. A oint construction for portable build ings comprising thecombination with rafters and a ridge-board contiguous to one to saidlast named plate at points adjacent the ends thereof.

2. In combination with rafters a ridge board contiguous therewith and across rafter extending between and joining the ratters, plates securedto the under sides of the first named rafters and overlapping oneanother at points beneath the, ridge-lmard, a plate mounted upon theuppermost of the overlapping portions and extending outwardly fromopposite sides of said overlapping portions, a rod extending thru saidplate and the overlapping portii'ins and se cured to the cross rafterand bolts conneciing end portions of the last named plate with theridge-board.

3. In combination with rafters. a ridgeboard extending between opposedends of the rafters and a cross rafter joining the first named rafters,of plates bolted to and extending along the under sides of the firstnamed rafters with end port ons thereof overlapping one another andbeine; horizontally disposed beneath the ridge-board. a plate mountedintermediate of its ends upon the uppermost of the overla 'ipingportions. means for securing end portions of said last named plates tothe ridge-board and a bracing rod extending thru said plate and theoverlapping portions and secured to the cross rafter.

4:. The combination with rafters. a ridgeboard disposed between opposedends of the rafters and a cross rafter connecting the first namedrafters. of plates bolted, to the respective first named rafters and tothe ridge-board and overlying and engaging one another beneath the ridgeboard and a brace or rod extending thru the overlying portions ofthe'plates and connected with the cross rafter.

